/*
 * Copyright (c) 2020 DuckDuckGo
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.duckduckgo.app.fire

import com.duckduckgo.app.fire.fireproofwebsite.data.FireproofWebsiteDao

class GetCookieHostsToPreserve(private val fireproofWebsiteDao: FireproofWebsiteDao) {
    operator fun invoke(): List<String> {
        val fireproofWebsites = fireproofWebsiteDao.fireproofWebsitesSync()
        return fireproofWebsites.flatMap { entity ->
            val acceptedHosts = mutableSetOf<String>()
            val host = entity.domain
            acceptedHosts.add(host)
            host.split(".")
                .foldRight(
                    "",
                    { next, acc ->
                        val acceptedHost = ".$next$acc"
                        acceptedHosts.add(acceptedHost)
                        acceptedHost
                    }
                )
            acceptedHosts
        }.distinct()
    }
}
